Some male birds build nests to attract partners, a bit like a guy turning up outside a pub with a Ferrari and shouting out "Oi! Get yer coat, you've pulled"!
no idea how he lost his tail though,he probably doesn't look very attractive to the females.....i hope his Ferrari is in a good state of repair ;)
Most birds' tailfeathers are loosely attached. If a predator (i.e., housecat) grabs them by the tail, the bird escapes and the cat is left with a mouthful of feathers. The feathers grow back in about two weeks.
This post handcrafted from 100 percent post-consumer recycled electrons.
While not my backyard, this was in the yard of a downtown church.